Renesas R5F2LA66ADFP#V0

Overview

R5F2LA66ADFP#V0 from Renesas Electronics is a 16-bit R8C CPU core MCU in the R8C/LA6A Group, featuring 32 KB program ROM, 2 KB RAM, and 2 KB data flash. It delivers 50 ns minimum instruction execution at 20 MHz (2.7–5.5 V), integrates an on-chip 16×16→32-bit multiplier, and supports real-time clock (Timer RH), 8-channel 10-bit A/D converter, and LCD drive control (up to 32 segment outputs) for embedded control in appliance user interfaces.

For engineers reviewing the R5F2LA66ADFP#V0 datasheet, R5F2LA66ADFP#V0 pinout, R5F2LA66ADFP#V0 application, or R5F2LA66ADFP#V0 equivalent, key selection criteria include its −40 to +85°C industrial temperature grade, 64-pin LQFP (0.5 mm pitch) package, integrated voltage detection and watchdog timer, and support for UART0, I²C-bus, and SSU serial interfaces in resource-constrained designs.

Technical Context

The R5F2LA66ADFP#V0 implements the R8C CPU core with 89 fundamental instructions and operates in single-chip mode across a 1 Mbyte address space. Its system clock generation includes XIN/XOUT (up to 20 MHz), dedicated XCIN/XCOUT (32 kHz), high-speed and low-speed on-chip oscillators, and a programmable frequency divider (1/2/4/8/16).

Peripheral integration includes Timer RB (8-bit ×2), Timer RC (16-bit ×1 with 4 capture/compare registers), Timer RH (real-time clock with calendar function), Timer RJ (16-bit ×2), UART0, I²C-bus/SSU, 10-bit A/D converter (8 channels + temperature sensor), comparator B (2 circuits), and LCD drive control (4 common, 32 segment outputs).

Key Specifications

Pinout & Package

Package: 64-pin LQFP (PLQP0064KB-A), 0.5 mm pin pitch, exposed pad not specified.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar microcontroller applications.

Compared with R5F2LA66ANFP, the R5F2LA66ADFP#V0 adds −40°C operation for harsher environments; compared with R5F2LA68ADFP, it offers identical functionality at lower cost and reduced memory overhead - making it optimal for fixed-feature, thermally demanding consumer and industrial controls.

Availability

R5F2LA66ADFP#V0 is available at Aetrix Electronics and suitable for refrigerator control panels, industrial HMIs, smart thermostats, and home appliance power monitors requiring stable component supply and long-term industrial temperature support.

Supply support for R5F2LA66ADFP#V0 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Renesas Electronics Corporation is a global semiconductor leader specializing in microcontrollers, analog, and power solutions for automotive, industrial, and IoT markets.

The R8C/LA6A Group, including R5F2LA66ADFP#V0, was designed for cost-effective, low-power embedded control in white goods and industrial HMIs - emphasizing integrated LCD driving, robust analog sensing, and extended temperature operation.

FAQ

What is the maximum operating frequency and supply voltage range for the R5F2LA66ADFP#V0?

The R5F2LA66ADFP#V0 operates at up to 20 MHz when supplied with 2.7–5.5 V, and supports down to 1.8 V at reduced 8 MHz operation. This dual-voltage/frequency capability allows flexible power rail design - for example, direct connection to 3.3 V systems with full performance, or battery-backed 1.8 V operation in ultra-low-power sleep modes. The R5F2LA66ADFP#V0 maintains full peripheral functionality across its entire voltage range.

Does the R5F2LA66ADFP#V0 include an integrated temperature sensor, and what is its accuracy?

Yes, the R5F2LA66ADFP#V0 includes an on-die temperature sensor with a specified measurement range of −40 to +85°C (D version). While absolute accuracy is not explicitly quantified in the datasheet, it is calibrated for relative drift compensation and thermal safety monitoring - commonly used to adjust A/D reference or disable outputs during overtemperature conditions. The sensor feeds into the same 10-bit A/D converter as external channels, and the R5F2LA66ADFP#V0 supports automatic background sweep mode for continuous monitoring.

How many LCD segment and common outputs does the R5F2LA66ADFP#V0 support, and what bias configurations are available?

The R5F2LA66ADFP#V0 supports up to 32 segment outputs and 4 common outputs via its integrated LCD drive control circuit. It supports static, 1/2, and 1/3 duty drive with 1/2 or 1/3 bias - enabling direct connection to common 4-digit, 7-segment, or custom alphanumeric LCD modules without external bias generators. Segment and common pins are allocated across P0–P5 ports, and configuration is controlled via LSE0–LSE5 registers. The R5F2LA66ADFP#V0's LCD driver operates independently of the main CPU clock, allowing display refresh during low-power modes.

What serial communication interfaces are available on the R5F2LA66ADFP#V0, and how are they mapped to pins?

The R5F2LA66ADFP#V0 provides UART0 (TXD0/RXD0 on P8_5/P8_6), I²C-bus (SDA/SCL shared with P8_3/P8_2), and SSU (synchronous serial unit, also on P8_3/P8_2/P8_1). UART0 supports standard asynchronous framing; I²C-bus operates up to 400 kHz; SSU supports master/slave SPI-like operation. These interfaces share pins but are mutually exclusive per configuration - for example, P8_2 serves as SCL (I²C) or SSCK (SSU), selected via register settings. The R5F2LA66ADFP#V0 does not include UART2 or CAN.

Is the R5F2LA66ADFP#V0 pin-compatible with other members of the R8C/LA6A Group, such as R5F2LA68ADFP?

Yes, the R5F2LA66ADFP#V0 is pin-compatible with all 64-pin LQFP variants in the R8C/LA6A Group, including R5F2LA68ADFP, R5F2LA64ADFP, and R5F2LA6AADFP. They share identical PLQP0064KB-A package, pin assignment, and peripheral pin mappings. Differences are limited to internal memory size (32 KB vs. 64 KB vs. 96 KB) and minor feature enablement - meaning PCB layout and firmware initialization remain unchanged across the family. The R5F2LA66ADFP#V0 can be upgraded to higher-ROM variants without hardware modification.